Re: [PATCH 44/83] hsa/radeon: HSA64/HSA32 modes support

[Jerome Glisse <j.glisse-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>]

On Fri, Jul 11, 2014 at 12:54:00AM +0300, Oded Gabbay wrote:
> From: Alexey Skidanov <Alexey.Skidanov-5C7GfCeVMHo@public.gmane.org>
> 
> Added apertures initialization and appropriate ioctl

What is process aperture and what it is use for ? This is a very
cryptic commit message.

Cheers,
Jérôme

> 
> Signed-off-by: Alexey Skidanov <Alexey.Skidanov-5C7GfCeVMHo@public.gmane.org>
> Signed-off-by: Oded Gabbay <oded.gabbay-5C7GfCeVMHo@public.gmane.org>
> ---
>  drivers/gpu/hsa/radeon/Makefile               |   2 +-
>  drivers/gpu/hsa/radeon/kfd_aperture.c         | 124 ++++++++++++++++++++++++++
>  drivers/gpu/hsa/radeon/kfd_chardev.c          |  58 +++++++++++-
>  drivers/gpu/hsa/radeon/kfd_priv.h             |  18 ++++
>  drivers/gpu/hsa/radeon/kfd_process.c          |  17 ++++
>  drivers/gpu/hsa/radeon/kfd_sched_cik_static.c |   3 +-
>  drivers/gpu/hsa/radeon/kfd_topology.c         |  27 ++++++
>  include/uapi/linux/kfd_ioctl.h                |  18 ++++
>  8 files changed, 264 insertions(+), 3 deletions(-)
>  create mode 100644 drivers/gpu/hsa/radeon/kfd_aperture.c
> 
> diff --git a/drivers/gpu/hsa/radeon/Makefile b/drivers/gpu/hsa/radeon/Makefile
> index 5422e6a..813b31f 100644
> --- a/drivers/gpu/hsa/radeon/Makefile
> +++ b/drivers/gpu/hsa/radeon/Makefile
> @@ -5,6 +5,6 @@
>  radeon_kfd-y	:= kfd_module.o kfd_device.o kfd_chardev.o \
>  		kfd_pasid.o kfd_topology.o kfd_process.o \
>  		kfd_doorbell.o kfd_sched_cik_static.o kfd_registers.o \
> -		kfd_vidmem.o kfd_interrupt.o
> +		kfd_vidmem.o kfd_interrupt.o kfd_aperture.o
>  
>  obj-$(CONFIG_HSA_RADEON)	+= radeon_kfd.o
> diff --git a/drivers/gpu/hsa/radeon/kfd_aperture.c b/drivers/gpu/hsa/radeon/kfd_aperture.c
> new file mode 100644
> index 0000000..9e2d6da
> --- /dev/null
> +++ b/drivers/gpu/hsa/radeon/kfd_aperture.c
> @@ -0,0 +1,124 @@
> +/*
> + * Copyright 2014 Advanced Micro Devices, Inc.
> + *
> + * Permission is hereby granted, free of charge, to any person obtaining a
> + * copy of this software and associated documentation files (the "Software"),
> + * to deal in the Software without restriction, including without limitation
> + * the rights to use, copy, modify, merge, publish, distribute, sublicense,
> + * and/or sell copies of the Software, and to permit persons to whom the
> + * Software is furnished to do so, subject to the following conditions:
> + *
> + * The above copyright notice and this permission notice shall be included in
> + * all copies or substantial portions of the Software.
> + *
> + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
> + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
> + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
> + * THE COPYRIGHT HOLDER(S) OR AUTHOR(S) BE LIABLE FOR ANY CLAIM, DAMAGES OR
> + * OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
> + * ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
> + * OTHER DEALINGS IN THE SOFTWARE.
> + *
> + */
> +
> +#include <linux/device.h>
> +#include <linux/export.h>
> +#include <linux/err.h>
> +#include <linux/fs.h>
> +#include <linux/sched.h>
> +#include <linux/slab.h>
> +#include <linux/uaccess.h>
> +#include <linux/compat.h>
> +#include <uapi/linux/kfd_ioctl.h>
> +#include <linux/time.h>
> +#include "kfd_priv.h"
> +#include "kfd_scheduler.h"
> +#include <linux/mm.h>
> +#include <uapi/asm-generic/mman-common.h>
> +#include <asm/processor.h>
> +
> +
> +#define MAKE_GPUVM_APP_BASE(gpu_num) (((uint64_t)(gpu_num) << 61) + 0x1000000000000)
> +#define MAKE_GPUVM_APP_LIMIT(base) (((uint64_t)(base) & 0xFFFFFF0000000000) | 0xFFFFFFFFFF)
> +#define MAKE_SCRATCH_APP_BASE(gpu_num) (((uint64_t)(gpu_num) << 61) + 0x100000000)
> +#define MAKE_SCRATCH_APP_LIMIT(base) (((uint64_t)base & 0xFFFFFFFF00000000) | 0xFFFFFFFF)
> +#define MAKE_LDS_APP_BASE(gpu_num) (((uint64_t)(gpu_num) << 61) + 0x0)
> +#define MAKE_LDS_APP_LIMIT(base) (((uint64_t)(base) & 0xFFFFFFFF00000000) | 0xFFFFFFFF)
> +
> +#define HSA_32BIT_LDS_APP_SIZE 0x10000
> +#define HSA_32BIT_LDS_APP_ALIGNMENT 0x10000
> +
> +static unsigned long kfd_reserve_aperture(struct kfd_process *process, unsigned long len, unsigned long alignment)
> +{
> +
> +	unsigned long addr = 0;
> +	unsigned long start_address;
> +
> +	/*
> +	 * Go bottom up and find the first available aligned address.
> +	 * We may narrow space to scan by getting mmap range limits.
> +	 */
> +	for (start_address =  alignment; start_address < (TASK_SIZE - alignment); start_address += alignment) {
> +		addr = vm_mmap(NULL, start_address, len, PROT_NONE, MAP_PRIVATE | MAP_ANONYMOUS, 0);
> +		if (!IS_ERR_VALUE(addr)) {
> +			if (addr == start_address)
> +				return addr;
> +			vm_munmap(addr, len);
> +		}
> +	}
> +	return 0;
> +
> +}
> +
> +int kfd_init_apertures(struct kfd_process *process)
> +{
> +	uint8_t id  = 0;
> +	struct kfd_dev *dev;
> +	struct kfd_process_device *pdd;
> +
> +	mutex_lock(&process->mutex);
> +
> +	/*Iterating over all devices*/
> +	while ((dev = kfd_topology_enum_kfd_devices(id)) != NULL && id < NUM_OF_SUPPORTED_GPUS) {
> +
> +		pdd = radeon_kfd_get_process_device_data(dev, process);
> +
> +		/*for 64 bit process aperture will be statically reserved in the non canonical process address space
> +		 *for 32 bit process the aperture will be reserved in the process address space
> +		 */
> +		if (process->is_32bit_user_mode) {
> +			/*try to reserve aperture. continue on failure, just put the aperture size to be 0*/
> +			pdd->lds_base = kfd_reserve_aperture(
> +						process,
> +						HSA_32BIT_LDS_APP_SIZE,
> +						HSA_32BIT_LDS_APP_ALIGNMENT);
> +
> +			if (pdd->lds_base)
> +				pdd->lds_limit = pdd->lds_base + HSA_32BIT_LDS_APP_SIZE - 1;
> +			else
> +				pdd->lds_limit = 0;
> +
> +			/*GPUVM and Scratch apertures are not supported*/
> +			pdd->gpuvm_base = pdd->gpuvm_limit = pdd->scratch_base = pdd->scratch_limit = 0;
> +		} else {
> +			/*node id couldn't be 0 - the three MSB bits of aperture shoudn't be 0*/
> +			pdd->lds_base = MAKE_LDS_APP_BASE(id + 1);
> +			pdd->lds_limit = MAKE_LDS_APP_LIMIT(pdd->lds_base);
> +			pdd->gpuvm_base = MAKE_GPUVM_APP_BASE(id + 1);
> +			pdd->gpuvm_limit = MAKE_GPUVM_APP_LIMIT(pdd->gpuvm_base);
> +			pdd->scratch_base = MAKE_SCRATCH_APP_BASE(id + 1);
> +			pdd->scratch_limit = MAKE_SCRATCH_APP_LIMIT(pdd->scratch_base);
> +		}
> +
> +		dev_dbg(kfd_device, "node id %u, gpu id %u, lds_base %llX lds_limit %llX gpuvm_base %llX gpuvm_limit %llX scratch_base %llX scratch_limit %llX",
> +				id, pdd->dev->id, pdd->lds_base, pdd->lds_limit, pdd->gpuvm_base, pdd->gpuvm_limit, pdd->scratch_base, pdd->scratch_limit);
> +
> +		id++;
> +	}
> +
> +	mutex_unlock(&process->mutex);
> +
> +	return 0;
> +}
> +
> +
> diff --git a/drivers/gpu/hsa/radeon/kfd_chardev.c b/drivers/gpu/hsa/radeon/kfd_chardev.c
> index e95d597..07cac88 100644
> --- a/drivers/gpu/hsa/radeon/kfd_chardev.c
> +++ b/drivers/gpu/hsa/radeon/kfd_chardev.c
> @@ -32,6 +32,9 @@
>  #include <linux/time.h>
>  #include "kfd_priv.h"
>  #include "kfd_scheduler.h"
> +#include <linux/mm.h>
> +#include <uapi/asm-generic/mman-common.h>
> +#include <asm/processor.h>
>  
>  static long kfd_ioctl(struct file *, unsigned int, unsigned long);
>  static int kfd_open(struct inode *, struct file *);
> @@ -107,9 +110,13 @@ kfd_open(struct inode *inode, struct file *filep)
>  	process = radeon_kfd_create_process(current);
>  	if (IS_ERR(process))
>  		return PTR_ERR(process);
> +
>  	process->is_32bit_user_mode = is_compat_task();
> +
>  	dev_info(kfd_device, "process %d opened, compat mode (32 bit) - %d\n",
> -				process->pasid, process->is_32bit_user_mode);
> +			process->pasid, process->is_32bit_user_mode);
> +
> +	kfd_init_apertures(process);
>  
>  	return 0;
>  }
> @@ -321,6 +328,51 @@ kfd_ioctl_get_clock_counters(struct file *filep, struct kfd_process *p, void __u
>  	return 0;
>  }
>  
> +
> +static int kfd_ioctl_get_process_apertures(struct file *filp, struct kfd_process *p, void __user *arg)
> +{
> +	struct kfd_ioctl_get_process_apertures_args args;
> +	struct kfd_process_device *pdd;
> +
> +	dev_dbg(kfd_device, "get apertures for PASID %d", p->pasid);
> +
> +	if (copy_from_user(&args, arg, sizeof(args)))
> +		return -EFAULT;
> +
> +	args.num_of_nodes = 0;
> +
> +	mutex_lock(&p->mutex);
> +
> +	/*if the process-device list isn't empty*/
> +	if (kfd_has_process_device_data(p)) {
> +		/* Run over all pdd of the process */
> +		pdd = kfd_get_first_process_device_data(p);
> +		do {
> +
> +			args.process_apertures[args.num_of_nodes].gpu_id = pdd->dev->id;
> +			args.process_apertures[args.num_of_nodes].lds_base = pdd->lds_base;
> +			args.process_apertures[args.num_of_nodes].lds_limit = pdd->lds_limit;
> +			args.process_apertures[args.num_of_nodes].gpuvm_base = pdd->gpuvm_base;
> +			args.process_apertures[args.num_of_nodes].gpuvm_limit = pdd->gpuvm_limit;
> +			args.process_apertures[args.num_of_nodes].scratch_base = pdd->scratch_base;
> +			args.process_apertures[args.num_of_nodes].scratch_limit = pdd->scratch_limit;
> +
> +			dev_dbg(kfd_device, "node id %u, gpu id %u, lds_base %llX lds_limit %llX gpuvm_base %llX gpuvm_limit %llX scratch_base %llX scratch_limit %llX",
> +					args.num_of_nodes, pdd->dev->id, pdd->lds_base, pdd->lds_limit, pdd->gpuvm_base, pdd->gpuvm_limit, pdd->scratch_base, pdd->scratch_limit);
> +			args.num_of_nodes++;
> +		} while ((pdd = kfd_get_next_process_device_data(p, pdd)) != NULL &&
> +				(args.num_of_nodes < NUM_OF_SUPPORTED_GPUS));
> +	}
> +
> +	mutex_unlock(&p->mutex);
> +
> +	if (copy_to_user(arg, &args, sizeof(args)))
> +		return -EFAULT;
> +
> +	return 0;
> +}
> +
> +
>  static long
>  kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
>  {
> @@ -352,6 +404,10 @@ kfd_ioctl(struct file *filep, unsigned int cmd, unsigned long arg)
>  		err = kfd_ioctl_get_clock_counters(filep, process, (void __user *)arg);
>  		break;
>  
> +	case KFD_IOC_GET_PROCESS_APERTURES:
> +		err = kfd_ioctl_get_process_apertures(filep, process, (void __user *)arg);
> +		break;
> +
>  	default:
>  		dev_err(kfd_device,
>  			"unknown ioctl cmd 0x%x, arg 0x%lx)\n",
> diff --git a/drivers/gpu/hsa/radeon/kfd_priv.h b/drivers/gpu/hsa/radeon/kfd_priv.h
> index 9d3b1fc..28155bc 100644
> --- a/drivers/gpu/hsa/radeon/kfd_priv.h
> +++ b/drivers/gpu/hsa/radeon/kfd_priv.h
> @@ -171,6 +171,16 @@ struct kfd_process_device {
>  
>  	/* Is this process/pasid bound to this device? (amd_iommu_bind_pasid) */
>  	bool bound;
> +
> +	/*Apertures*/
> +	uint64_t lds_base;
> +	uint64_t lds_limit;
> +	uint64_t gpuvm_base;
> +	uint64_t gpuvm_limit;
> +	uint64_t scratch_base;
> +	uint64_t scratch_limit;
> +
> +
>  };
>  
>  /* Process data */
> @@ -212,6 +222,10 @@ void radeon_kfd_install_queue(struct kfd_process *p, unsigned int queue_id, stru
>  void radeon_kfd_remove_queue(struct kfd_process *p, unsigned int queue_id);
>  struct kfd_queue *radeon_kfd_get_queue(struct kfd_process *p, unsigned int queue_id);
>  
> +/* Process device data iterator */
> +struct kfd_process_device *kfd_get_first_process_device_data(struct kfd_process *p);
> +struct kfd_process_device *kfd_get_next_process_device_data(struct kfd_process *p, struct kfd_process_device *pdd);
> +bool kfd_has_process_device_data(struct kfd_process *p);
>  
>  /* PASIDs */
>  int radeon_kfd_pasid_init(void);
> @@ -237,6 +251,7 @@ int kfd_topology_add_device(struct kfd_dev *gpu);
>  int kfd_topology_remove_device(struct kfd_dev *gpu);
>  struct kfd_dev *radeon_kfd_device_by_id(uint32_t gpu_id);
>  struct kfd_dev *radeon_kfd_device_by_pci_dev(const struct pci_dev *pdev);
> +struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx);
>  
>  /* MMIO registers */
>  #define WRITE_REG(dev, reg, value) radeon_kfd_write_reg((dev), (reg), (value))
> @@ -253,4 +268,7 @@ void kgd2kfd_interrupt(struct kfd_dev *dev, const void *ih_ring_entry);
>  void kgd2kfd_suspend(struct kfd_dev *dev);
>  int kgd2kfd_resume(struct kfd_dev *dev);
>  
> +/*HSA apertures*/
> +int kfd_init_apertures(struct kfd_process *process);
> +
>  #endif
> diff --git a/drivers/gpu/hsa/radeon/kfd_process.c b/drivers/gpu/hsa/radeon/kfd_process.c
> index f89f855..80136e6 100644
> --- a/drivers/gpu/hsa/radeon/kfd_process.c
> +++ b/drivers/gpu/hsa/radeon/kfd_process.c
> @@ -397,3 +397,20 @@ struct kfd_queue *radeon_kfd_get_queue(struct kfd_process *p, unsigned int queue
>  		test_bit(queue_id, p->allocated_queue_bitmap)) ?
>  			p->queues[queue_id] : NULL;
>  }
> +
> +struct kfd_process_device *kfd_get_first_process_device_data(struct kfd_process *p)
> +{
> +	return list_first_entry(&p->per_device_data, struct kfd_process_device, per_device_list);
> +}
> +
> +struct kfd_process_device *kfd_get_next_process_device_data(struct kfd_process *p, struct kfd_process_device *pdd)
> +{
> +	if (list_is_last(&pdd->per_device_list, &p->per_device_data))
> +		return NULL;
> +	return list_next_entry(pdd, per_device_list);
> +}
> +
> +bool kfd_has_process_device_data(struct kfd_process *p)
> +{
> +	return !(list_empty(&p->per_device_data));
> +}
> diff --git a/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c b/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
> index 7ee8125..30561a6 100644
> --- a/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
> +++ b/drivers/gpu/hsa/radeon/kfd_sched_cik_static.c
> @@ -627,7 +627,8 @@ static void cik_static_deregister_process(struct kfd_scheduler *scheduler,
>  	struct cik_static_private *priv = kfd_scheduler_to_private(scheduler);
>  	struct cik_static_process *pp = kfd_process_to_private(scheduler_process);
>  
> -	if (priv && pp) {
> +
> +	if (priv && pp)	{
>  		release_vmid(priv, pp->vmid);
>  		kfree(pp);
>  	}
> diff --git a/drivers/gpu/hsa/radeon/kfd_topology.c b/drivers/gpu/hsa/radeon/kfd_topology.c
> index 21bb66e..213ae7b 100644
> --- a/drivers/gpu/hsa/radeon/kfd_topology.c
> +++ b/drivers/gpu/hsa/radeon/kfd_topology.c
> @@ -1201,3 +1201,30 @@ int kfd_topology_remove_device(struct kfd_dev *gpu)
>  
>  	return res;
>  }
> +
> +/*
> + * When idx is out of bounds, the function will return NULL
> + */
> +struct kfd_dev *kfd_topology_enum_kfd_devices(uint8_t idx)
> +{
> +
> +	struct kfd_topology_device *top_dev;
> +	struct kfd_dev *device = NULL;
> +	uint8_t device_idx = 0;
> +
> +	down_read(&topology_lock);
> +
> +	list_for_each_entry(top_dev, &topology_device_list, list) {
> +		if (device_idx == idx) {
> +			device = top_dev->gpu;
> +			break;
> +		}
> +
> +		device_idx++;
> +	}
> +
> +	up_read(&topology_lock);
> +
> +	return device;
> +
> +}
> diff --git a/include/uapi/linux/kfd_ioctl.h b/include/uapi/linux/kfd_ioctl.h
> index a7c3abd..e5fcb8b 100644
> --- a/include/uapi/linux/kfd_ioctl.h
> +++ b/include/uapi/linux/kfd_ioctl.h
> @@ -78,6 +78,23 @@ struct kfd_ioctl_get_clock_counters_args {
>  	uint64_t system_clock_freq;	/* from KFD */
>  };
>  
> +#define NUM_OF_SUPPORTED_GPUS 7
> +
> +struct kfd_process_device_apertures {
> +	uint64_t lds_base;/* from KFD */
> +	uint64_t lds_limit;/* from KFD */
> +	uint64_t scratch_base;/* from KFD */
> +	uint64_t scratch_limit;/* from KFD */
> +	uint64_t gpuvm_base;/* from KFD */
> +	uint64_t gpuvm_limit;/* from KFD */
> +	uint32_t gpu_id;/* from KFD */
> +};
> +
> +struct kfd_ioctl_get_process_apertures_args {
> +	struct kfd_process_device_apertures process_apertures[NUM_OF_SUPPORTED_GPUS];/* from KFD */
> +	uint8_t num_of_nodes; /* from KFD, should be in the range [1 - NUM_OF_SUPPORTED_GPUS]*/
> +};
> +
>  #define KFD_IOC_MAGIC 'K'
>  
>  #define KFD_IOC_GET_VERSION	_IOR(KFD_IOC_MAGIC, 1, struct kfd_ioctl_get_version_args)
> @@ -85,6 +102,7 @@ struct kfd_ioctl_get_clock_counters_args {
>  #define KFD_IOC_DESTROY_QUEUE	_IOWR(KFD_IOC_MAGIC, 3, struct kfd_ioctl_destroy_queue_args)
>  #define KFD_IOC_SET_MEMORY_POLICY	_IOW(KFD_IOC_MAGIC, 4, struct kfd_ioctl_set_memory_policy_args)
>  #define KFD_IOC_GET_CLOCK_COUNTERS	_IOWR(KFD_IOC_MAGIC, 5, struct kfd_ioctl_get_clock_counters_args)
> +#define KFD_IOC_GET_PROCESS_APERTURES _IOR(KFD_IOC_MAGIC, 6, struct kfd_ioctl_get_process_apertures_args)
>  
>  #pragma pack(pop)
>  
> -- 
> 1.9.1
>